This class defines a vector function F: R^n->R^m and methods for computing or approximating its first and second derivatives.
This class implements a memoization logic. There are methods :None:None:`fun`, :None:None:`jac`, hess` and corresponding attributes f
, :None:None:`J` and :None:None:`H`. The following things should be considered:
Use only public methods
:None:None:`fun`,:None:None:`jac`and:None:None:`hess`.After one of the methods is called, the corresponding attribute will be set. However, a subsequent call with a different argument of any of the methods may overwrite the attribute.
Vector function and its derivatives.
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